checkmate1996

All,

I am scouring my engine for engine leaks and took off the oil pressure sender as the leads are very oily. However, when I took the unit off, there is a tight fitting crush washer. When I check the PET for any OB year, USA or ROW, no washer type is listed. Did someone put on by accident? Is there a standard size crush washer that can be used?

See PIC for area that I'm referring to. THX

Garth S

IIRC, sensors I've seen have the washer fitted at time of assembly: if so, they are 'captive', and nonreplacable.

justin

Should be number 59, for some reason PET shows the oil sender,OR a plug which is number 60,but I believe the same crush ring.

checkmate1996

Justin,

59 is right. It's an aluminum crush ring, of which I replaced. Garth, I think I'm leaning toward what you are saying as others haven't mentioned that. So, is it worth fooling with?

borland

pc 59 and 60 need to be torqued with a torque wrench before installing the sensor. It's a likely place to leak unless you tightened it near the torque specification 80Nm (59 ft-lbs).

Don't attempt to tighten pc 60 without a torque wrench, as you could over tighten and strip the threads on the block which would be impractical to restore.

The sensor crush ring can be reused a few times and doesn't require much tightening to keep from leaking.

SharkSkin

If you have oily terminals on the sender, you may be nearing replacement time anyway. Clean up around there when you put it back in so you can be sure where any oil is coming from, and keep an eye on it. A replacement should come with a washer(but ask for a spare anyway).

IcemanG17

When I changed my oil thermostat springs (56-57-58) I also put in a new crush ring...it was cheap only a few $$ from any of the big three....just buy a new one!

Garth S

#59 is for the thermal housing insert .... above the sensor: it is a true crush ring, made of a hollow aluminium tube stock.
The sensor crush washer, is as Borland agrees, reusable.
As far as oil on the wires, all oil leaks end up wetting the wires, and are rarely the sensor itself ..... that process of discovery is how I destroyed my first sensor

928FIXER

No torque to yeild crush washer can be reused.On the second retorqueing it will not yeild agian unless it is grossly over tightened